Enter the feet per minute and wheel diameter into the calculator to determine your revolutions per minute (RPM).

FPM to RPM Calculation Formula

The following formula is used to calculate the RPM from your FPM and wheel diameter.

RPM = (FPM * 12) / (π * Diameter)

Variables:

  • RPM is the revolutions per minute.
  • FPM is the feet per minute.
  • Diameter is the diameter of the wheel in inches.

To calculate the RPM, multiply the FPM by 12 (to convert to inches), then divide by the product of π and the wheel diameter.

What is FPM to RPM Calculation?

FPM to RPM calculation refers to the process of determining the number of revolutions a wheel makes per minute based on its linear speed in feet per minute. This involves understanding the relationship between the wheel’s circumference and its rotational speed. Proper FPM to RPM calculation is essential in various mechanical and engineering applications to ensure accurate speed and performance measurements.

How to Calculate RPM?

The following steps outline how to calculate RPM using the given formula.

  1. First, determine your FPM based on the linear speed of the wheel.
  2. Next, measure the diameter of the wheel in inches.
  3. Use the formula from above: RPM = (FPM * 12) / (π * Diameter).
  4. Finally, calculate the RPM by plugging in the values.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge.

FPM = 600

Diameter = 20 inches

Using the formula, RPM = (600 * 12) / (π * 20) = 114.59 RPM

FAQ

1. What is RPM?

RPM stands for revolutions per minute and measures how many times a wheel or shaft rotates in one minute.

2. How is RPM different from FPM?

FPM measures the linear speed in feet per minute, while RPM measures the rotational speed in revolutions per minute.

3. How often should I use the FPM to RPM calculator?

It’s helpful to use the FPM to RPM calculator whenever there’s a change in your speed or wheel size, or if you want to ensure accurate performance measurements.

4. Can this calculator be used for different wheel sizes?

Yes, you can adjust the wheel diameter field to match the size of any wheel to calculate the RPM accordingly.

5. Is the calculator accurate?

The calculator provides an estimate of your RPM based on the inputs provided. For exact figures, it’s best to consult detailed mechanical measurements.